Well, after reading the many posts on motor oil today, guess I learned something. I never realized or thought much about, having an expiration date on motor oils. Not that I've bought oil and kept it on the shelf for much more than a year, but interesting. Maybe those of us doing our own oil changes need to look at the dates on the oils we buy. As also stated, a quality filter is a must as well. One thought, for those that will probably purchase a vehicle and keep it for 4 or 5 years at most, and/or about 100k, think that probably the frequency and /or mileage between changes probably could be extended out to at least 7K or 1 year (full syn.). But, extreme heat and miles of stop and go driving will require more frequency. As I plan on keeping mine for well over 10 years and maybe to 200k, I feel that the payback on engine longevity probably will pay me back for the shorter intervals, (5k). Also, I don't have the heat and or stop and go plus anytime it is started, will run a minimum of 30 miles and the first and last 9 miles are at hi way speeds. So much to consider and each has their own opinions. Guess, in the end, your personal experience and that each of us will bare the cost, makes us all a little different. Good Luck to us All.
By then my coffee was cold. A 5 is a 5 on start up. I'm just looking at the top number for the Florida heat, idling in traffic.
